Learn to select a sending speed for your SMS campaigns.
Similar to email campaigns, you can throttle broadcast SMS campaign sending speeds. Selecting a send rate for your SMS campaigns is a great solution to control the flow of inbound responses. You can turn on throttling, even if an SMS campaign is an immediate or a scheduled send.
Setting the send speed
To set a sending speed, go to the Send campaign page (under Campaigns) when you’re creating a campaign, next to the Select send time area. The send will be broken down into chunks (of 100 contacts) over the time period you select, therefore the minimum number of contacts required for throttling to work is 100.
You can use the default sending speed, meaning as soon as possible, or spread the campaign send out over 1, 2, 3, 6, 12 or 24 hours.